Virt-who parameters 'filter_host_parents' and 'filter_hosts' do not behave as expected when set in a single /etc/virt-who.d/virt-who-config-X.conf file

Issue

Setting the Virt-who parameter filter_hosts along with the filter_host_parents parameter in a single /etc/virt-who.d/virt-who-config-X.conf file, Virt-who does not identify hypervisors and guests on both the ESX clusters as well as the standalone ESX hosts:

# tail -f /var/log/rhsm/rhsm.log

2021-12-14 18:14:05,221 [INFO] @virt.py:651 - Hosts-to-guests mapping for config "virt-who-config-3": 0 hypervisors and 0 guests found